American Avocet - Ross Feldner

This elegant, leggy wader moves through shallow waters swishing its thin, upturned bill from side to side looking to catch aquatic invertebrates.

American Avocets were previously found across most of the United States until extirpated from breeding on the East Coast. Their breeding habitat consists of marshes, beaches, prairie ponds, and shallow lakes in the mid-west. Their migration route lands them in almost every state in the western United States and on the East Coast from Delaware south to Florida where they spend the winter.

American Avocets nest on the ground in places with little to no surrounding vegetation. They make shallow indentations in the ground for their nest and line it with grass, feathers, pebbles or other small objects. Some avocets do not line their nests at all!

The avocet’s call has been described as both a shrill and melodic alarm bweet, which rises in inflection over time. Avocets use three distinct calls: common call, excited call, and broken wing call. They do the broken wing feint like the Killdeer. The common call is a loud repeated wheep. The excited call has a similar wheep sound, but it speeds up rather than having an even rhythm. Lastly, the broken wing call is noticeably different from the other two calls. It is a distressed screech sound and is alarming rather than melodic.

American Avocet
Fun Facts

The American Avocet predator alert is a series of calls that slowly rise in pitch. This simulates the Doppler effect and makes the approach of the avocet seem faster than it really is.

American Avocets place their nests directly on the ground.

A group of avocets is called a colony.

Only 1 day after leaving the nest, avocet chicks can walk, swim and dive to escape predators.

Flocks ranging from 50 to 300 avocets migrate together.

Nests are built in areas that predators would struggle to gain access to.

In the winter, the avocet feeds extensively on brine shrimp.

Shooting and trapping of American avocets led to population decline until the 1900s.

Numbers have been increasing steadily in the eastern United States for the past few years.

Both male and female build the nest.

Click here to watch an American Avocet feeding and preening

Click here to listen to an avocet’s vocalizations.

 

Rachel Carson Council
8600 Irvington Avenue  | Bethesda, Maryland 20817-3604
(571) 262-9148 | bob@rachelcarsoncouncil.org

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